Statistics for occurrence #1 of “Missouri rivers” in entry indians-american of Harper's Encyclopedia of United States History:

...ing away. They embraced numerous tribes, from the mouth of the Columbia River to the Grand Dalles. The Shoshones comprise tribes inhabiting the territory around the headwaters of the Columbia and Missouri rivers ; the Comanches, extending from the head-waters of the Brazos to those of the Arkansas; families in Utah and Texas, and several tribes in California. The Attakapas and Chitemachas, in Texas, hav...
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